SCIAMACHY as an A.O. instrument is followed by science teams in the three participating counties: Germany with IFE at the University of Bremen and several institutions including the University of Heidelberg and MPI Mainz, in the Netherlands, KNMI and SRON lead the Dutch scientific team while in Belgium, the Belgian Institute for Space Aeronomy leads a Belgian science team. The main objective of the instrument was to give a complete mapping of stratospheric ozone of which the role as a UV-B filter is essential to sustained life on the earth's surface. SCIAMACHY has also a tropospheric sounding capability and is thus to follow the chemical weather of the global troposphere. The results obtained since ENVISAT launch have shown various surprising influences of biological processes in the atmosphere including new biogenic sources of trace gases relevant to ozone chemistry in both the troposphere and stratosphere. Biogeosciences aspect are as relevant to atmospheric science as they are to earth science as important sources of methane, nitrous oxide, formaldehyde, glyoxal and other products are mainly biological.